package top.huxy.web.util;

import cn.hutool.core.util.StrUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.net.InetAddress;

/**
 * @author aproz
 * @date 2022/2/22
 */
@Slf4j
public class RequestUtils {
    public static HttpServletRequest getCurrentRequest() {
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (requestAttributes == null) {
            return null;
        }
        return requestAttributes.getRequest();
    }

    public static HttpServletResponse getCurrentResponse() {
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (requestAttributes == null) {
            return null;
        }
        return requestAttributes.getResponse();
    }

    public static String getCurrentRequestIp() {
        HttpServletRequest request = getCurrentRequest();
        if (request == null) {
            return null;
        }
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknow".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
            if ("127.0.0.1".equals(ip)) {
                //根据网卡取本机配置的IP
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (Exception e) {
                    e.printStackTrace();
                }
                ip = inet.getHostAddress();
            }
        }

        // 多个代理的情况，第一个IP为客户端真实IP,多个IP按照’,'分割
        if (ip != null && ip.length() > 15) {
            if (ip.indexOf(",") > 0) {
                ip = ip.substring(0, ip.indexOf(","));
            }
        }
        return ip;

    }

    public static String getCookieValue(Cookie[] cookies, String name) {
        if (cookies == null || cookies.length == 0 || StrUtil.isEmpty(name)) {
            return null;
        }
        for (Cookie cookie : cookies) {
            if (cookie.getName().equals(name)) {
                return cookie.getValue();
            }
        }
        return null;
    }
}
